Task: #2 — Berufserfahrung Timeline
## What was done
- Created new `experience.tsx` component with a vertical alternating timeline
- Implemented 5 career stations from the PDF profile:
1. Senior IT-Consultant @ Landesamt für Statistik Bayern (01/2024–heute)
2. Technischer Redakteur @ Polizei Hessen (04/2024–12/2024)
3. Projektkoordinator @ Justiz Baden-Württemberg (04/2023–10/2023)
4. Senior IT-Systems Engineer @ Amt d. öff. Rechts Hamburg (10/2020–04/2023)
5. Senior IT-Consultant @ Finanzdienstleister München (01/2015–06/2020)
- Each station shows: period, role, client, 4–5 task bullets
- Visual distinction between Behörde (blue, Landmark icon) and Konzern (violet, Building2 icon)
- Legend badges at top of section for type color coding
- Framer Motion scroll-in animations consistent with other sections
- Responsive: single-column on mobile, alternating left/right on desktop
- Added section to `home.tsx` after Bio, with `id="experience"`
- Added "Erfahrung" nav link to `navbar.tsx` (both desktop and mobile menu)
## Deviations
- None. All 5 required stations implemented with 3–5 bullets each as specified.
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